[Hearing that whoever her friend is will be fine is good, both for their sake and for having a better sense of how much Clarke is dealing with. Her short answers aren't giving him much to work with, but her tone is, and he allows the subject change with a nod and an attempt at lightening the mood a little--]

Sure, though you may want to choose the subject. If it's up to me you'll just getting boring talk about music or how tempted I am to see if the bakery a few blocks from here might not have been raided yet.

[He wants a muffin and if they've been abandoned to the monsters then no harm in putting them to good use, right? Right.

But really, the point is that while he's willing to change subjects, he's trying to keep her engaged to an extent. Pulling yourself out of these sorts of states is difficult when left to dwell in them, and he knows that from experience rather than just training.]